/*
 * Copyright 2024 The CHANGLEI Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:flutter/scheduler.dart';

/// Created by box on 2021/5/15.
///
/// 监听[SchedulerBinding.instance.addPostFrameCallback]
class Scheduler {
  /// 构造函数
  Scheduler.postFrame(VoidCallback callback) {
    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.persistentCallbacks) {
      SchedulerBinding.instance.addPostFrameCallback((duration) {
        if (_canceled) {
          return;
        }
        callback.call();
      });
    } else {
      callback.call();
    }
  }

  bool _canceled = false;

  /// 取消监听
  void cancel() {
    _canceled = true;
  }
}
